Method and device for recognizing blinding attacks in a quantum encrypted channel
AssigneeId Quantique SA
InventorsFélix Bussières, Gaëtan Gras
Life of this patent
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Abstract
A receiver for recognizes blinding attacks in a quantum encrypted channel having an optical fiber. The receiver includes a multipixel detector having a plurality of pixels, and configured to be illuminated by a light beam outputted by the optical fiber. A processing unit connects to the multipixel detector and is configured to determine the presence of a blinding attack if a predetermined number of pixels detects light within a predetermined interval. The receiver recognizes blinding attacks in a quantum encrypted channel and implements a method for recognizing blinding attacks in a quantum encrypted channel.
Claims12
A receiver (2200, 8200) for recognizing blinding attacks in a quantum encrypted channel (1300) comprising an optical fiber, comprising a multipixel detector (2210, 4210a, 4210b, 4210c, 5210, 6210a, 6210b) comprising a plurality of pixels (4211-4219, 5211-5212, 6211a-6212a, 6211b-6212b), and configured to be illuminated by a light beam outputted by the optical fiber, and a processing unit (2220) connected to the multipixel detector (2210, 4210a, 4210b, 4210c, 5210, 6210a, 6210b) and configured to determine the presence of a blinding attack if a predetermined number of pixels (4211-4219, 5211-5212, 6211a-6212a, 6211b-6212b) detects light within a predetermined interval, wherein the light beam expands to the area covered by the predetermined number of pixels.
A method (3000, 10000) for recognizing blinding attacks in a quantum encrypted channel (1300) comprising an optical fiber, the method comprising the steps of
- detecting (S3100) a light outputted by the optical fiber by means of a receiver (2200, 8200), comprising a multipixel detector (2210, 4210a, 4210b, 4210c, 5210, 6210a, 6210b) comprising a plurality of pixels (4211-4219, 5211-5212, 6211a-6212a, 6211b-6212b), configured to be illuminated by the light,
- counting (S3200, S10210-S10220) a number of pixels (4211-4219, 5211-5212, 6211a-6212a, 6211b-6212b) which detected light within a predetermined interval, and
- evaluating (S3300, S10310-S10330) a presence of a blinding attack based on the result of the counting step (S3200, S10210)
- wherein the light expands to the area covered by the number of pixels.
Dependencies are inferred from the claim text.